Speed-regulating means for motive-power engines



May 15, 1928.

R. P. L. HYTTE SPEED REGULATING MEANS FOR MOTIVE POWER ENGINES Filed July 26 1920 l/IIIIIII I 17/1; (211 6-03 v flPLlif z-a;

Patented May 15, 1928.

SJUNITEDSTATEVS PATENT OFFICE.

ROBERT roN'rrrs LAEsSEN-EYTTE, F s'ro 'ro 'rHEnE LAVAL SEPARATOR COMPANY, .oE EW YORK, NJ Y.,-A

ASSIGNMENTS, 'coEroEA'rIoN on NEW JERSEY.

CKHOLM, SWEDEN, ASSIGNOR, BY. MESNE SPE D-R GULATING MEANS on MomvE-rowEE ENGINES.

Application filed July 26, 1920, Serial No. 399,099, and in sweden August 6, 1919, V

In order to render the regulation of the speed of a motive power engine by means of a centrifugal governor sufficiently sensitive, it is necessary that the power of the governor be in a certain relation to the resistance of the regulating member actuated by the gov:

. ernor. In steam engines this regulating member consists either of a throttle-valve, or

of a deviceby means of whichthe. admission to the cylinder is influenced. At any rate, a considerable amount of power is required to bring about the regulation, even if the device is as owell balanced as possible. Consequent-' ly, the governors often have to be given comparatively large dimensions, whichin turn increases the costsand the space required.

The object of the present invention comprises an arrangement whereby a the said drawback is reduced, so that a governor of relatively little powermay be brought to actuate a regulating member oflering 'considerable resistance to the movements. v

The arrangement i distinguished by this that the transmission of the motion from the rotating governor to theregulating member does not take place continually, but intermittently insuch a manner that the governor and the regulating member. are caused to cooperate with each other during a certain portion of the revolution, while the governor is cut out from suchv a cooperation during the remaining portion of the revolution. During this latter portion of the revolution the governor may thus move independently of the resistance of the regulating member, 1n a direction determined by the prevalent change of speed of the engine, after which, when the remaining portion of the revolution is entered upon, a certain impact caused by the inertia of the revolving mass of the governor is actuating the regulating memher with a considerable amount of power.

An embodiment of the invention is shown in the accompanying drawing.

(1 denotes the weights'of the governor, the said weights being pivotally mounted on the studs b and actuating the sleeve 0% by means of the levers 0, the sleeve d being slidably mounted on the shaft e and pressed downwardly by the helical spring 2'. The said sleeve (2 has guides associated therewith in the form of a pair of flanges f, the space'between the flanges being occu ied by the stud g connected to the stem 0 the admission valve fThe' distance between the flanges at part of the circumference corresponds to the diameter of the stud g, while'at the remaining portion of the circumference the distance between the flanges is greater than the diameter of the stud, as will be seen from the drawing- The, transition between the two distances is preferably rounded.

The operation of the device is as followsi If, for example, the engine is unloaded, so

that it will have a tendency. to increase its speed, the centrifugal power acting on the weights at is also increased, whereby the weights tend to move the sleeve 6! upwardly against the action of the spring z' 'Ifthe stud g is then within the narrow space be: tween the flangesfi'the sleeve is pressing against the stud 9, but not sufficiently to cause a. movement of ,the stud when the change in Speed is small, as the centrifugal force exerted is not thensuflicient to over come the friction within the valve,and consequently there willbe no axial movement of the sleeve. However, as soon as the governor has revolved so much that the stud g is within the space having the greater distance between the flanges .f, the sleeved can move freely and an axial displacement thereof takes place. vWhen, afterthe governor hasrevolved still further, the Stud 9 ,reenters the narrower spacebetweenjthe flanges, it does not fit into its new position, but an' impact occurs, in this case between the lower flange and the stud, the consequence of this being a displacement of the Stud, in spite of the considerable resistance offered against the movement thereof.

The same cycle of operations is repeated during each consecutive revolution, until the stud has been displaced sufficiently to adjust the admission of steam to the new load onthe engine, the governor having then assumed another position of equilibrium corresponding to the new speed.

, In 'the same way the cycle of operations take place on an increase in the load on the engine and a' subsequent decrease of the speed. v

Evidently,'the governor may in this way operate a rather heavy-working valve, as the impacts yield a considerable amount of ower, while the governor is free to adjust ltself independently of the motive resistance of the regulating member. in such a I cure by fied'in various respects, but a condition for the proper operation thereof isthat the resistance of the regulating member against thefmovement thereof be only a passive one.

What I claim "as new and desire to setters Patent of the United States is LA motive fluid feedv control device for engines, comprising a centrifugal governor arranged to be rotated by the'engine, ai'valve movable to regulate the supply of motive fluid to the engin j, an element adapted to rotate with the governor and also bodily 'lnovable as the speedof theengine varies, a

movable memberadapted @tdactuate 7 said motive fluid supply regulating valve, means providing an engagement "between said member and element during a part of each revolution of the latter and adapted to re strain said element from bodily movement,

and means rotating with saidelement and adapted, after a bodily movement of said 1 element while freefrom said restraining ply'regula ns d engin s, comp si g a n r g s i means tolengage said member impactandjfmove t to actuate the motive Qflmd sup 2. motive fiuidgfeed control. device for a grooved element carried thereby and ar ranged to be rotated and moved 'longitud-i naljly along its axis the governor, a" mot ve ,fluid controlfvalve, a crank connected t9 [th valve, and c an 'Pin n h Crank extending into "the groove; .of thesaid smo d e, e 'li' i t,' PQ Q h r ve being the same width as the crank pin while the remainder ofthe groove is wider 7 than the crank pin, the arrangement being 11 b that' he gro v d e em n c n b'e m v by the governor without a fi'ec ting-v-the 'valve when the crank pin is in thewider portion of the groove while the valve is shifted to the shifted position of the gBQOVQd element whenthe crank pin passes fromfthewvvider portion of the groove to theivo her iper the combination with, governing mechanism comprising 'anlelement centrifugally operable'in the operation of the engine, and a rotatable member connected with the centrif ugal element bodily movable as the 1 speed of the engine varies, of athrottlingdevice for regulating thefsupply of motive fluid to theengine; 'circumferentially extending guides on the rotatable member presenting relatively closely approximating parallel opposing surfaces alonga part of the circumference; opposing surfaces spaced relatively widely apartalong anotherpart of'the circumference, and relatively short cams each connecting the two' specifiedsurfaces of oneof the guides; and a jstud on z the throttling device extending between the guides and, while between the relatively closely approximating "surfaces ,thereof; adapted to hold said memberfrom'bodily movement, and; while between the more Widely separated guide surfaces, freeing said member forbodil-y' movement, whereby after such ,bodily movement,%one of said eams,*in theconti-Iiued rotation of'saidmember, strikes the stud; and shifts the position a of the throttlingl device before the re-entry of the stud between themore closely approximating surfaces ofthe guides.

I noxsxrromvs IJARSSEN m I 

